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and humic substances
It also withstands hot water up to 160° F and has a working pressure of 125 PSI
STANDARD USE Start with 2 ml per gallon of nutrient solution
Special synthetic rubber diaphragm provides consistent airflow output which can be easily adjusted with the pressure dial
HMD PH/TEMP PEN PH-200 LEGACY MANUFACTURING and humic substancesPH 200: FEATURES Measures pH and temperature Auto ranging three point calibration with digital fine tuning Includes 4 pH buffer solution in a sponge embedded in a clear cap, so you can see if it's dried up Waterproof housing Simultaneous temperature display Measurement Range: 0 14 pH Digital Calibration (push button)Auto off function, data hold function and low battery indicatorDisplay: large and easy to read LCD screen includes simultaneous